Invention Grant
- Patent Title: Technique for efficiently and dynamically maintaining bidirectional forwarding detection on a bundle of links
- Patent Title (中): 用于在一组链路上有效和动态地维护双向转发检测的技术
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Application No.: US11366732Application Date: 2006-03-02
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Publication No.: US08543718B2Publication Date: 2013-09-24
- Inventor: Reshad A. Rahman , David P. Toscano , Sylvain Masse , David D. Ward , Neil R. Ketley
- Applicant: Reshad A. Rahman , David P. Toscano , Sylvain Masse , David D. Ward , Neil R. Ketley
- Applicant Address: US CA San Jose
- Assignee: Cisco Technology, Inc.
- Current Assignee: Cisco Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Cesari and McKenna, LLP
- Main IPC: G06F15/16
- IPC: G06F15/16 ; G06F15/173
Abstract:
A technique efficiently and dynamically maintains bidirectional forwarding detection (BFD) on a bundle of links in a computer network. According to the novel technique, one or more “standby” BFD sessions may be established on one or more corresponding line cards (LCs), the LCs having one or more links of the bundle (bundle links). Once established, one of the standby BFD sessions may be selected as an “active” BFD session based on activity of one of the bundle links of the corresponding LC. Also, BFD messages may be transmitted from one of the bundle links of the active BFD session, e.g., the link receiving BFD messages. In response to inactivity of the transmitting link (e.g., failure, removal, etc.), the active BFD session may switch to another available active bundle link, and if no other active bundle links are available to the active BFD session, one of the standby BFD sessions is selected as the new active BFD session. In the event no other standby BFD sessions exist, the link bundle is determined to have failed.
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